Looking for Easy Groundbreaking Stuff… at Least for Me…

I discovered memory palaces, pegging systems and linking system only last year and I really find that for the effort invested in learning to use them they are really worthwhile. There are many CONCRETE/DEMONSTRATABLE things I’m able to do now that I couldn’t do last year. Of course I can remember stacks of cards and shopping lists (which is enough to impress most people)… but more useful I can remember major steps of speeches or demonstrations just by reviewing them 15 minutes before events! Before memory palaces it would take me hours / days to prepare this kind of stuff. I remember people’s names in big meetings (makes a huge difference when you can call people by their name right away). Before it would take 10 meetings before I got people’s names. I’ve got the statutes of my current projects at work in my head, at any time I’m ready to discuss them (for example a surprise phone call from the customer, or a unexpected encounter at a conference, or just simply to question the team at the coffee machine …). Before I’d have to dig into some reports and excel tables (which I still have of course)…

Basically, I just can’t stop thinking :

What else is there out there that is as simple and valuable as these memory tricks and that I could benefit from? What are your "simple to learn and life changing" tricks?